import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate  from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'
Vue.use(Router)
const router =  new Router({
  routes: [
    {path: '/', redirect: '/login'},
    { path: '/login', component: Login },
    { path: '/home', component: Home,
      redirect: '/welcome',
    children :[
      {path: '/welcome', component: Welcome},
      {path: '/users', component:Users},
      {path: '/rights', component:Rights},
      {path: '/roles', component:Roles},
      {path: '/categories', component:Cate},
      {path: '/params', component: Params},
      {path: '/goods', component: GoodsList},
      {path: '/goods/add', component: Add},
      {path: '/orders', component: Order},
      {path: '/reports', component: Report},
    ] }
  ]
})

//挂载路由导航守卫
router.beforeEach((to,from,next) => {
//to将要访问的路径
//form代表从哪个路径跳转而来
//next是一个函数，表示放行
//  next() 放行 next('/login') 强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router